Welcome to the forums,
The 2019 MacBook Pro models are supposed to be a big improvement over the 2018 models for thermals and noise. That said they are designed to be thin portable devices rather than desktop computers so all laptops are going to be handicapped for heavier use that is really better suited to a desktop computer with a suitable cooling design and implementation for heavier use.
There can be quite a lot of work to get computer running macOS well. The basic installation is generally very quick and can pass quite easily - the truth is that there are some important and in depth parts of installation to be completed after the OS is up and running in a basic state. A lot of users that try macOS more than likely never get their machine working fully, then they run into issues with graphics, USB or something else that doesn't quite work right.
For Audio use please note that *as far I am am aware* hot plugging of ThunderBolt devices does not work on hackintoshes at present.
Audio Section of the forum which will have lots of good information for you:
www.tonymacx86.com
The Golden Builds section is where there are good build guides for various hardware configurations which will give you a good idea of what to expect on getting your system set up and what processes are required after the initial USB installation has been completed. As many of these guides have been going for some time it documents life with a machine over a period of time.
Great Examples of User Builds - Chosen by the Mods
www.tonymacx86.com
Do you really need an i9? Could an i7 not be powerful enough?
A real Mac is plug and play, has a good resell value - a PC does require some work, but you can design it to look the way you would like it to look and it is easy to add a graphics card of additional RAM or storage.
A production machine is best updated when your work commitments allow - don't update a production machine the moment an update becomes available from Apple. Leave it until you have time in your schedule and check that Apple haven't done something to cause the community problems - may take a day or two to find a fix. TMX provide update recommendations for each update but check that most folk have an easy update before you go and jump in.
Here is the 10.14.5 update thread - the first two posts detail what the update is understood to change and general best practice to go through for that update.
Today Apple released macOS 10.14.5, a major software update to macOS Mojave. Update any supported system using the built-in Software Update functionality through the System Preferences pane or by using the standalone installer available from Apple.com. Download the macOS Mojave 10.14.5 Update...
www.tonymacx86.com
Reliability can be excellent, with many users saying that their Hackintosh is more reliable and performs better than their real macs over a period of time.
Apple do produce good computers so even if you decide that your main rig should perhaps be a Mac, why not build a Hack as a side project at some point to see if you like it.